This Bosch HSS drill bit accessory set comes with 34 pieces, organised in a hardened plastic case. Suitable for masonry, wood and metal. The set includes 5 Wood drill bits (4-8mm), 5 HSS metal drill bits (2-5mm), 5 masonry drill bits (5-8mm), 3 socket wrenches (7/8/10mm), 1 adaptor for socket wrench, 1 universal holder, 1 countersink bit, and 13 screwdriver bits (25mm) including PH 1/2/3, PZ 1/2/3, SL 4/6/7, T 15/20/25/30.